public ActionResult Register(string username, string password, string Email)
{
RegisterManager r = new RegisterManager();
if (r.CheckUsername(username) == false && r.CheckPassword(username, password) == true)
{
using SqlConnection conn = new SqlConnection(ConfigClass.connectionString);
using SqlCommand query = new SqlCommand($"insert into [dbo].[user] (id, username, password, email) values ('{r.GetId()}', '{username}', '{password}', '{Email}')", conn);
conn.Open();
query.ExecuteNonQuery();
conn.Close();
}
return(RedirectToAction("Index", "Home"));
}